唤醒
湍流
大涡模拟
旋涡脱落
离散化
有限体积法
机械
流量(数学)
涡流
压缩性
平流
计算机模拟
数学
物理
数学分析
雷诺数
热力学
作者
Odenir de Almeida,Sérgio Said Mansur,Aristeu da Silveira Neto
出处
期刊:Engenharia térmica
[Universidade Federal do Parana]
日期:2008-06-30
卷期号:7 (1): 55-55
被引量:6
标识
DOI:10.5380/reterm.v7i1.61743
摘要
This paper concerns with unsteady incompressible flows around rectangular cylinders with side ratio varying from 1 to 10. Phenomenological aspects are discussed and numerical simulations are performed using a SIMPLEC finite volume code. A third-order QUICK scheme is employed for the advective terms in the Navier-Stokes equations, while a second-order fully implicit method is used for the time discretization. For validation purpose, preliminary simulations are carried out at Re = 300. Afterwards, the flow patterns and the wake periodic features are examined at Re = 1,000, 5,000, and 22,000, for which turbulent effects should not be neglected. In some of those cases, large-eddy simulation (LES) is employed, using the classical sub-grid Smagorinsky model. Important physical mechanisms determining vortex shedding frequency are placed in evidence. The present predictions are compared with numerical and experimental results from other works and a good agreement is reached.
科研通智能强力驱动
Strongly Powered by AbleSci AI